IN UINT8 *Buffer\r
)\r
{\r
- EFI_STATUS TempStatus;\r
- UINT32 Tmp;\r
- UINT32 TmpBuf;\r
- UINT32 WordToWrite;\r
- UINT32 Mask;\r
- UINTN DoErase;\r
- UINTN BytesToWrite;\r
- UINTN CurOffset;\r
- UINTN WordAddr;\r
- UINTN BlockSize;\r
NOR_FLASH_INSTANCE *Instance;\r
- UINTN BlockAddress;\r
- UINTN PrevBlockAddress;\r
\r
- PrevBlockAddress = 0;\r
+ Instance = INSTANCE_FROM_FVB_THIS (This);\r
\r
- Instance = INSTANCE_FROM_FVB_THIS(This);\r
-\r
- if (!Instance->Initialized && Instance->Initialize) {\r
- Instance->Initialize(Instance);\r
- }\r
-\r
- DEBUG ((DEBUG_BLKIO, "FvbWrite(Parameters: Lba=%ld, Offset=0x%x, *NumBytes=0x%x, Buffer @ 0x%08x)\n", Instance->StartLba + Lba, Offset, *NumBytes, Buffer));\r
-\r
- // Detect WriteDisabled state\r
- if (Instance->Media.ReadOnly == TRUE) {\r
- DEBUG ((EFI_D_ERROR, "FvbWrite: ERROR - Can not write: Device is in WriteDisabled state.\n"));\r
- // It is in WriteDisabled state, return an error right away\r
- return EFI_ACCESS_DENIED;\r
- }\r
-\r
- // Cache the block size to avoid de-referencing pointers all the time\r
- BlockSize = Instance->Media.BlockSize;\r
-\r
- // The write must not span block boundaries.\r
- // We need to check each variable individually because adding two large values together overflows.\r
- if ( ( Offset >= BlockSize ) ||\r
- ( *NumBytes > BlockSize ) ||\r
- ( (Offset + *NumBytes) > BlockSize ) ) {\r
- DEBUG ((EFI_D_ERROR, "FvbWrite: ERROR - EFI_BAD_BUFFER_SIZE: (Offset=0x%x + NumBytes=0x%x) > BlockSize=0x%x\n", Offset, *NumBytes, BlockSize ));\r
- return EFI_BAD_BUFFER_SIZE;\r
- }\r
-\r
- // We must have some bytes to write\r
- if (*NumBytes == 0) {\r
- DEBUG ((EFI_D_ERROR, "FvbWrite: ERROR - EFI_BAD_BUFFER_SIZE: (Offset=0x%x + NumBytes=0x%x) > BlockSize=0x%x\n", Offset, *NumBytes, BlockSize ));\r
- return EFI_BAD_BUFFER_SIZE;\r
- }\r
-\r
- // Pick 128bytes as a good start for word operations as opposed to erasing the\r
- // block and writing the data regardless if an erase is really needed.\r
- // It looks like most individual NV variable writes are smaller than 128bytes.\r
- if (*NumBytes <= 128) {\r
- // Check to see if we need to erase before programming the data into NOR.\r
- // If the destination bits are only changing from 1s to 0s we can just write.\r
- // After a block is erased all bits in the block is set to 1.\r
- // If any byte requires us to erase we just give up and rewrite all of it.\r
- DoErase = 0;\r
- BytesToWrite = *NumBytes;\r
- CurOffset = Offset;\r
-\r
- while (BytesToWrite > 0) {\r
- // Read full word from NOR, splice as required. A word is the smallest\r
- // unit we can write.\r
- TempStatus = NorFlashRead (Instance, Instance->StartLba + Lba,\r
- CurOffset & ~(0x3), sizeof(Tmp), &Tmp);\r
- if (EFI_ERROR (TempStatus)) {\r
- return EFI_DEVICE_ERROR;\r
- }\r
-\r
- // Physical address of word in NOR to write.\r
- WordAddr = (CurOffset & ~(0x3)) + GET_NOR_BLOCK_ADDRESS (Instance->RegionBaseAddress,\r
- Lba, BlockSize);\r
- // The word of data that is to be written.\r
- TmpBuf = *((UINT32*)(Buffer + (*NumBytes - BytesToWrite)));\r
-\r
- // First do word aligned chunks.\r
- if ((CurOffset & 0x3) == 0) {\r
- if (BytesToWrite >= 4) {\r
- // Is the destination still in 'erased' state?\r
- if (~Tmp != 0) {\r
- // Check to see if we are only changing bits to zero.\r
- if ((Tmp ^ TmpBuf) & TmpBuf) {\r
- DoErase = 1;\r
- break;\r
- }\r
- }\r
- // Write this word to NOR\r
- WordToWrite = TmpBuf;\r
- CurOffset += sizeof(TmpBuf);\r
- BytesToWrite -= sizeof(TmpBuf);\r
- } else {\r
- // BytesToWrite < 4. Do small writes and left-overs\r
- Mask = ~((~0) << (BytesToWrite * 8));\r
- // Mask out the bytes we want.\r
- TmpBuf &= Mask;\r
- // Is the destination still in 'erased' state?\r
- if ((Tmp & Mask) != Mask) {\r
- // Check to see if we are only changing bits to zero.\r
- if ((Tmp ^ TmpBuf) & TmpBuf) {\r
- DoErase = 1;\r
- break;\r
- }\r
- }\r
- // Merge old and new data. Write merged word to NOR\r
- WordToWrite = (Tmp & ~Mask) | TmpBuf;\r
- CurOffset += BytesToWrite;\r
- BytesToWrite = 0;\r
- }\r
- } else {\r
- // Do multiple words, but starting unaligned.\r
- if (BytesToWrite > (4 - (CurOffset & 0x3))) {\r
- Mask = ~((~0) << ((CurOffset & 0x3) * 8));\r
- // Mask out the bytes we want.\r
- TmpBuf = (TmpBuf << ((CurOffset & 0x3) * 8)) & Mask;\r
- // Is the destination still in 'erased' state?\r
- if ((Tmp & Mask) != Mask) {\r
- // Check to see if we are only changing bits to zero.\r
- if ((Tmp ^ TmpBuf) & TmpBuf) {\r
- DoErase = 1;\r
- break;\r
- }\r
- }\r
- // Merge old and new data. Write merged word to NOR\r
- WordToWrite = (Tmp & ~Mask) | TmpBuf;\r
- BytesToWrite -= (4 - (CurOffset & 0x3));\r
- CurOffset += (4 - (CurOffset & 0x3));\r
- } else {\r
- // Unaligned and fits in one word.\r
- Mask = (~((~0) << (BytesToWrite * 8))) << ((CurOffset & 0x3) * 8);\r
- // Mask out the bytes we want.\r
- TmpBuf = (TmpBuf << ((CurOffset & 0x3) * 8)) & Mask;\r
- // Is the destination still in 'erased' state?\r
- if ((Tmp & Mask) != Mask) {\r
- // Check to see if we are only changing bits to zero.\r
- if ((Tmp ^ TmpBuf) & TmpBuf) {\r
- DoErase = 1;\r
- break;\r
- }\r
- }\r
- // Merge old and new data. Write merged word to NOR\r
- WordToWrite = (Tmp & ~Mask) | TmpBuf;\r
- CurOffset += BytesToWrite;\r
- BytesToWrite = 0;\r
- }\r
- }\r
-\r
- //\r
- // Write the word to NOR.\r
- //\r
-\r
- BlockAddress = GET_NOR_BLOCK_ADDRESS (Instance->RegionBaseAddress, Lba, BlockSize);\r
- if (BlockAddress != PrevBlockAddress) {\r
- TempStatus = NorFlashUnlockSingleBlockIfNecessary (Instance, BlockAddress);\r
- if (EFI_ERROR (TempStatus)) {\r
- return EFI_DEVICE_ERROR;\r
- }\r
- PrevBlockAddress = BlockAddress;\r
- }\r
- TempStatus = NorFlashWriteSingleWord (Instance, WordAddr, WordToWrite);\r
- if (EFI_ERROR (TempStatus)) {\r
- return EFI_DEVICE_ERROR;\r
- }\r
- }\r
- // Exit if we got here and could write all the data. Otherwise do the\r
- // Erase-Write cycle.\r
- if (!DoErase) {\r
- return EFI_SUCCESS;\r
- }\r
- }\r
-\r
- // Check we did get some memory. Buffer is BlockSize.\r
- if (Instance->FvbBuffer == NULL) {\r
- DEBUG ((EFI_D_ERROR, "FvbWrite: ERROR - Buffer not ready\n"));\r
- return EFI_DEVICE_ERROR;\r
- }\r
-\r
- // Read NOR Flash data into shadow buffer\r
- TempStatus = NorFlashReadBlocks (Instance, Instance->StartLba + Lba, BlockSize, Instance->FvbBuffer);\r
- if (EFI_ERROR (TempStatus)) {\r
- // Return one of the pre-approved error statuses\r
- return EFI_DEVICE_ERROR;\r
- }\r
-\r
- // Put the data at the appropriate location inside the buffer area\r
- CopyMem ((VOID*)((UINTN)Instance->FvbBuffer + Offset), Buffer, *NumBytes);\r
-\r
- // Write the modified buffer back to the NorFlash\r
- TempStatus = NorFlashWriteBlocks (Instance, Instance->StartLba + Lba, BlockSize, Instance->FvbBuffer);\r
- if (EFI_ERROR (TempStatus)) {\r
- // Return one of the pre-approved error statuses\r
- return EFI_DEVICE_ERROR;\r
- }\r
-\r
- return EFI_SUCCESS;\r
+ return NorFlashWriteSingleBlock (Instance, Lba, Offset, NumBytes, Buffer);\r
}\r
\r
/**\r
projects / mirror_edk2.git / blobdiff